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Патент USA US2118369

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24, 1938.
5D. vANclL
v 2,118,369v '
MACHINE FOR GRINDINGLAMINATED ARTICLES
Filed March 26, 1956
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INVENTOR,
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>May 24, 1938-
_2,118,369
E. D. vANclL
MACHINE FOR GRINDING LAMINATED ARTICLES
Filed March 26,' 1936
6 Sheets-Sheet 2
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INVENTOR.
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ATTORNEY
May 24, 1938»
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Filed March 26, 1936
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E. D. vANc:||.MACHINE FOR GRINDING LAMINATED ARTICLES
Filed March 26, 1936
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INVENTOR.
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May 24, 1938.
E. D. vANclL
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MACHINE FOR GRINDING LAMINATED ARTICLES
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Filed March 26, 1956
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INVENTOR
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ATTORNEY
» May 24, 193s.
2,118,369
E. D. VANCIL
MACHINE FOR GRINDING LAMINATED ARTICLÉS
Filed March 26, 1936
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2,118,369
Patented May 24, 1938
UNITED STATES
PATENT OFFICE
2,118,369
MACHINE
FOR
GRINDING
ARTICLES
LAMINATED’
Edgar D. Vancil, Cincinnati, Ohio, assignor to
Cincinnati Grinders Incorporated, Cincinnati,
Ohio, a corporation of Ohio
'
Application March 26, 1936, Serial No. 70,982
12 Claims.
This invention relates to grinding machines,
and more particularly to a special automatic
machine for grinding rectilinear grooves.
One of the objects of this invention is to pro
5 vide a machine for performing a grooving opera
tion which cannot be readily accomplished on
conventional machines without a multiplicity of
adjustments.
cept by a multiplicity of operations.
An additional object of this invention is to
provide a special automatic machine for grind
ing grooves in automobile springs for the attach
ment of side-sway eliminators.
Other objects and advantages of the present in
,.)0 vention should be readily apparent by reference
‘
to the following specification, considered in con
junction with the accompanying drawings form
ing a part thereof and it is to be understood
that any modifications may be made in the eX
act structural details there shown and described,
25 within the scope of the appended claims, With
out departing from or exceeding the spirit of
the invention.
v
Referring to the drawings in which like refer
30 ence numerals indicate like or similar parts:
Figure 1 is an elevation of a- machine tool em
bodying the principles of this invention.
Figure 2 is a plan view of the machine shown
in Figure 1.
35
Figure 3 is a vertical section on the line 3_3
of Figure 2.
`
Figure 4 is a cross section on the line 4_4 of
Figure 3.
l
Figure 5 is a section taken on the line 5_5 of
40 Figure 3.
Figure 6 is a section on the line 6_6 of Fig
ure 5.
Figure 7 is a section on the line 'I-'I of Fig
ure 3.
45
Figure 8 is a section on the line 8_8 of Fig
ure '7.
Figure 9 is a section on the line 9_9 of Fig
ure 7.
Figure 10 is a section on the line I0_I0 of
50
.
Flgure
1.
Figure 11 is a section on the line II-II of
Figure 6.
Figure 12 is a section on the line I2--I2 of
55 Figure 5.
Figure 13 is an elevational view of the Work
holding carriage.
Figure 14 is a diagram of the electrical control
circuit.
Figure 15 is a diagram of the fluid pressure 25
control circuit.
Figure 16 is an expanded View of the one revolu
tion cam track.
A further object of this invention is to pro
w vide an improved simplified mechanism for de
ilecting and holding a vehicular spring as under
load conditions, and forming a configuration
therein which could not be formed otherwise ex
35
(Cl. 51_92)
The machine comprises, in general, a large
table, part of which is ñxed, and whereupon a 10
laminated article may be assembled and manipu
lated, and the other part of which is movable
whereby relative adjustment between the article
and a tooling element, such as a grinding mech
anism, may be eiîected.
:15
Referring to Figures 1, 2, and 4, the reference
numeral Ill indicates the bed of the machine
and upon this is supported a movable table por
tion Ii and a ñXed table portion I2, these por
tions lying in the same plane.
.'26
A work supporting carriage I3, such as shown
in Figure 13, is provided for manual movement
from a work loading position, indicated generally
by the reference numeral I4, in Figure 2, to a
tooling position, indicated generally by the ref- ¿25
erence numeral I5 in the same figure. When
the carriage is in the work loading position, a
work piece I6, which may be a laminated vehicu
lar spring, such as used on automobiles and the
like, may be placed in the ñXture and located |30
by a pin I6' passed through the eye in the end
of the spring and resting in a semi-circular notch
formed in the end of the work holder. A second
pin It” may beA passed through the eye in the
other end of the spring and slidably rested on
the upper edge of the sides of the work holder.
A power operated ram, such as I'I, is moved down
ward to hatten out the laminated article into
the form in which it is shown in Figure 4. This
ram is attached to a piston, not shown, which is 40
movable in a cylinder I8 which is supported in
overhanging relation With respect to the ñxed
table portion I2 and the work carriage is manu
ally movable to a position under the ram where
by upon movement of a control valve I9, the ram 45
may be power moved downward a suitable amount
to flatten out the article.
By reference to Figures 1 and 13, it will be
seen that the work carrier has two pairs of
upstanding side supports 20 and 2| and holes 50
22 and 23 are drilled through each pair. When
the article has been suiliciently flattened, bolts,
such as 24 shown in Figures 1 and 4, may be
passed through these holes to hold the Work in
position. The ram I'I may now be elevated and 55
2
2,118,369
the carrier moved as on the supporting rollers
25 from the work loading position to the tooling
position shown in Figure 2.
The work carrier has a pair of countersunk
holes 25 formed in the uprights and the carrier
is positioned so that these countersunk holes are
in line with dowel pins 2l having cone-shaped
heads 28. The dowel pins are carried in one jaw
29 of a vise, the other jaw 39 being power oper
10 able to move the carrier against the jaw 29 and
in so doing cause the cone-shaped heads 28 to
enter the countersunk holes 25, and at the same
time slightly raise the carrier from the table so
that it will clear the same.
The jaws 39 are pivotally connected to the
lower end of bell cranks 3l and 32 which are,
in turn, connected to an equalizer cross bar 33
second switch 63, being closed, will short circuit
switch 53 and maintain the coil 59 energized.
By the switch 52 being closed, it is now possible
when the slide 55 moves forward and automati
cally opens switch 53 and closes switch 52, to
energize the starting coil 54, one end of which is
connected by line 95 to the power line Gland
the other end connected through the line 55,
closed switch 52, line 51, closed switch 52 and
line 58 to the other power line 55.
10
When the valve 52, Figure 15, is moved to its
starting position, shown in this figure, the pres
sure admitted to line 38 also passes through line
69 to the lower end of cylinder '19. This causes
upward movement of the container piston ‘H and
piston rod 12 which, as shown in Figure 3, has
rack teeth 13 formed thereon in mesh with gear
pivotally connected at 35 to the end of piston` 14. The gear M is keyed to the end of shaft 15,
rod 35.
This piston rod carries a piston 35
20 which is movable in a cylinder 3l. This cylin
der is connected as shown in Figure l5 by a
channel 38 to port 39 of a control valve 40 hav
ing an intake pressure port 4|. The valve plung
er 42, which may be manually rotated by ,a _han
25 dle 4_3, shown in Figure lof the drawings, serves
to connect the pressure port M to the port 35
whereby the workV carrier may be clamped to a
vertically movable slide 55 which is, in turn, car
ried by a cross slide 55. It will, of course, be
'30 evident that since the piston and cylinder >above
mentioned must be carried by the vertical slide
44 that suitable flexible connections must be made
between the cylinder and the control valve 59
which is located in the .bed of the machine with
35 its operating handle in a Vconvenient place for ac
cess by the operator.
Attention is >invited
pins 2B also serve to
with respect to a pair
40 41 which are located
l
to the fact that the dowel
properly locate the work
of grinding wheels 45 and
opposite the slide ¿ill and
are suitably spaced on a spindle 4B to grind
grooves in the work in the desired spaced rela
tion. Each wheel is also of a width correspond
ing to the width of groove desired in the work.
45 These grinding wheels may be rotated by suit
able power means, not shown, and may also be
provided with a suitable truing mechanism such
as that indicated generally by the reference nu
meral 49 in Figure 1. Since such truing mech
anisms are well known in the art, further descrip
tion thereof is not believed to be necessary.
Power operable mechanism has been provided
for reciprocating the slide M vertically to trav
erse the work tangentially relative to the faces
of the grinding wheels and for automatically
infeeding the work toward the face of the grind
ing wheels to determine the depth of the groove.
This mechanism is driven by a prime mover 5i?.
This motor is started by the automatic closing of
60 switch 5l which is controlled by the electrical
circuit shown in Figure 14. This circuit has a
pair of switches 52 and 53, the former of which
is held open by a cam 54 attached to the rear of
a sub-support 55 when the same is in a retracted
position, and the latter switch is held closed by
a similar cam means attached to the rear of
slide 55.
Since the switch 53 was closed by the previous
return of slide 55, it completed a circuit from the
line
main58,
power
coil> source
59 and56line
through
59 to line
the 51,
other
switch
line 5i
of the power source.
'It
Energization of the coil 59
closed switch 62 and this automatically locked
the switch, because even although switch 53 will
be opened when the slide 55 starts forward, a
as shown in Figure 5, which has an eccentric
arm 16, Figure 11„attached to the end thereof
and interengaging a-link Tf, as more particularly
shown in Figure 6. This link is connected by a
pin 'i8 to the rear end of slide 55.
Referring now to Figure 3, it will be evident
that upon admission of fluid to the lower end
of cylinder 'lli the piston 7| will move upward
,and thereby through the rack and pinion connec
tion rotate the eccentric 16 in a counterclockwise
direction and thereby move the sub-support 55
and Ythe work carried thereby into grinding rela
tion with the grinding wheels. Simultaneously,
this movement will eii‘ect the opening of switch
53 and the closing of switch 52 to start actuation
of the prime mover 59.
The prime mover is connected through the fol
lowing mechanism to slide 29 to effect reciproca
tion thereof. As shown in Figure 7, the arma
ture shaft of the prime mover has a sprocket
wheel 'i9 which is connected by a chain 80 to a
sprocket wheel 8i secured to the end of shaft 82. 40
This shaft, as shown in Figure 3, has a pinion
gear 83 keyed to the end thereof in mesh with
gear 8f! keyed to the end of shaft 85. This shaft
is anti-frictionally supported in the housing of
slide 45, and on the forward end is provided with ,
a crank arm 85 which is connected by link 8'1 to '
a pin B8 projecting from the rear of slide 29. It
will be apparent that as the shaft 85 is contin
uously rotated, the slide 29 will be vertically re
ciprocated, thereby moving the work tangentially .
relative to the face of the grinding wheels.
It is also necessary, in addition to reciprocating
the work, to gradually feed the work into the
grinding wheels in order to effect the desired
depth of groove. To this end, the shaft 85 has a
a spiral gear 89 secured thereto, as shown-in
Figure 3, which intermeshes with a spiral gear
99 keyed to shaft Si. Through this means, the
shaft 9| is rotated at a very slow rate relative
to shaft 85 and the latter serves to drive an in
feeding mechanism. In furtherance of this end,
the shaft 9| has attached thereto the member
92 in which is formed a cam groove 93 for receiv
ing a roller 94 attached to the end of a crank arm
95. This crank arm, as more particularly 65
shown in Figure 8, is secured to a shaft 96 which
has splines 91 formed in one end thereof for ro
tating a gear sector 98. This gear sector, as
shown in Figure 5, intermeshes with a pinion
9T’ keyed to shaft 98', which shaft, as shown in
Figure 6, has a screw thread 99 cut on one por
tion thereof. This screw thread is rotated rela
tive to a nut |99 which is held against rotation
by a Worm i0l intermeshing with gear teeth §02
cut on the periphery of the nut. A spring ID3
-3
2,118,369
may be interposed between a ñxed portion of the
nut and a movable portion |04 thereof Yfor elimi
nating backlash. -
»
Attention is invited to the fact that the gear
(Il sector 98 is mounted in a housing |05 which is
attached tothe sub-support 55 and therefore it
is necessary to provide the spline connection in
order that the shaft 96 may move with the slide
45. The housing |05 also contains the gear 97
and a thrust bearing` |06 which holds the shaft '
98 against axial movement, whereby upon rota
tion of the screw 99 the nut |00, which is held
against axial movement in the slide 45, will cause
the slide to move relative to the sub-support 55.
Manually operable means have also been pro
15
vided for eiîecting relative adjustment between
the support 45 and the sub-support 55 for set-up
purposes and the like, and this mea-ns, which is
more particularly shown in Figure 10, comprises
a hand wheel |01 operatively connected to a shaft
|08, the latter being anti-frictionally journaled
in the slide 45. A pinion |09 secured to the end
of this shaft intermeshes with a gear ||0 ñxed
with shaft | || to which is secured a worm |0|
meshing with a worm |02. The worm and worm
gear are those previously mentioned, which nor
mally hold the nut |00 against rotation, but upon
rotation of the hand wheel |01, when the screw
99 is stationary, it will be apparent that relative
30 vrotation between the screw and nut can still be
effected and the slide 45 adjusted relative to the
sub-support 55.
Referring now to Figure 3, the shaft 85 serves
as a common actuator for a first branch trans
mission which reciprocates the vertical slide 29
and for a second branch transmission, which
» continuously effects infeedin'g of the work during
reciprocation. Due tothe reduction in rate ef
fected by the spiral gears 89 and 90, the shaft 9|
40 is rotated at a very slow speed, whereby the slide
29 may make a large number of reciprocations
`.for one revolution of the shaft 9|.
Means are
provided whereby the shaft 9| is, in effect, a
o-ne revolution shaft, whereby, after the shaft
line 6'8.
Therefore, upon continuedl movement
of thedog | l5 and opening of switch H8, the coil
54 will be de-energized and the switch 5| will be
automatically opened to stop the motor 50. At
the same time, a brake H9, which is held open r
by the solenoid |20 coupled across the motor
lines by branches |2| and |22, will become de
energized and a spring |23 will apply the brake to
prevent overrun of the motor.
The machine is now automatically stopped and -1 -10
the operator may throw the valve 42, shown in
Figure 15, clockwise to connect the pressure port
4| to the line §24, which will cause downward
movement of the piston 1| and thereby retrac
tion of the sub-support 55 and parts carried ".15
thereby to move the work away from the grind
ing wheels. This pressure also flows to the upper
end of cylinder 3?, causing downward movement
of the piston rod 35 and release of the clamp
jaws 30. It will be noted that the return from §20
this cylinder must pass through a throttle valvev
|25 because the check valve |26 will be automati
cally closed at this time, thereby delaying the»v
release of the work luntil the sub-support 55 has
been fully retracted.
When the sub-support has reached its re
tracted position it will open switch 52, Figure 14.
and close switch 53, thereby energizing coil 59
and closing the switch 52, which thus conditions
the circuit so that upon thenext forward move 30
ment of the slide 55 the closing of switch 52 will
energize coil 64 and close the motor starting
switch 5|.
'I‘he work carrier I3 may now be rolled out onto
the table I2 and turned around on the table and
reinserted in the carrier clamping jaws for
grinding grooves in the other side of the work.
There has thus been provided a simple mech
anism whereby a vehicular spring may be power
deilected and held as under actual conditions of ...40
use, and a configuration machined therein by a
simple operation, while so held, and which could
not be formed otherwise yexceptby a multiplicity
of operations.'
has made one revolution, certain controls will
I claim:
be operated to stop the grinding operation.
l. A grinding machine having rotatable grind
In View of this, the cam groove 93 in the mem
ber 92 has been >so formed that during one revo
lution thereof it will effect the necessary infeed
ing, followed by a subsequent dwell for clean
up purposes, and then a rapid retraction of the
parts. The shape of this cam groove is shown
in 'expanded view in Figure 16 in which the or
dinate | |2'indicates the starting point, and from
this point through an angle of substantially 252
degrees to the ordinate | i3 a continuous infeed
is effected, and during the next 36 degrees the
cam path is straight so as to provide a dwell for
lcleaning up purposes.
During the neXt ’72 degrees the cam path is so
formed as to eiîect a rapid retraction of lthe work
slide relative to the grinding wheel.
. The shaft 9| has a dog carrier ||4 to which is
45
ing means, means for supporting and moving
work in operative relation to the grinding means
including a sub-support, a work support mounted
thereon for relative movement along paths an 50
gularly related to one another, power operable
means for reciprocating the work support along
one path of its movement and uni-directionally
along its second path oi' movement, power oper
able means for moving the sub-support to posi
55
tion the work support in a tangential p-lane rel- "' `
ative to the grinding means, and means respon
sive to said positioning movement of the'sub
support to initiate actuation of both of said power
operable means.
60
2. In a machine tool having a slide power mov- '
able relative to a tooling element to effect a ma
chining operation, the combination with the slide
attached a dog H5. A pair of radially arranged
plungers ||6 and ||'| are provided for actuation
by the'dog and these plungers operate switches
63 and ||8 respectively. As viewed in Figure 9,
the dog wheel l i4 rotates clockwise whereby the
switch 63 is operated first and, as seen in Figure
14, when this switch is open, it de-energizes the
of a removable work holder, cooperating means
on the slide and work holder for locating one 65
coil 59 because the switch 53 is also open at this
time and this causes automatic opening of switch
position.
52. The current flowing through the coil 04
which holds switch 5| closed now travels through
line 66, closed switch E2 and closed switch 5| t0
with respect to the other and thereby positioning
the work in desired relation to the tooling ele
ment, and anti-frictional supporting rollers car
ried by the work holder whereby the same may be v
readily moved from the slide to a work loading 70
3. A grinding machine having a grinding
wheel, a ñrst slide movable in one plane, a work
slide carriedthereby and movable in a second
plane, means carried by one of said slides for 75
¿2,118,369
:reciprocatingthe otherrelative thereto, means
' for feeding the iirst slide, a prime mover for driv- '
¿ing both of said means, a separate power oper
iable device for moving the slides into grinding
Vposition, and means automatically operable upon
-said last-named movement for starting the said
'8, Ina> grinding machine` havinga fgrlnding
wheel, and a »work supporting slide-movable in
one direction to reciprocate the workV in ,opera
tive engagement" with the lgrinding wheel, ,and
in a 'second direction toinfeed thework relative
to the grinding wheel; of »a prime mover, means
coupling the prime mover for reciprocation. ofthe
primev mover.
4. -A ' grinding machine ~-having a grinding
wheel, a> first slide> movable in one plane, a work
-slidegcarried thereby and movable in a Second
plane, means carried by one of said slides for
'reciprocating the other relative'thereto,„means
-for feeding the ñrst slide,»a prime mover for driv
ing both of said means, a separate power oper
' 115 able device for moving the slides into grinding
position, and means automatically operable upon
-said last-named movement for starting the said
--prime mover, said automatically 'operable means
lincluding a power operable switch, and a'pilot
electrical control Acircuit including a -switch
slide, a one revolution cam coupled tothe prime
>`mover for infeeding the slide, saidV cam having-*a
?lrst cam portion for continuously infeeding> the n
slide, asecond portion for causing-»a dwell in the
:slide anda third portion for rapidly retracting
the slide, and" means simultaneously vopera-bleat
the endof one revolution'of the >cam to stop. the
. prime mover.
9. In a grinding machine, the combinationcofI
«a grinding wheel, of means for operatively :asso
ciatinga work piece therewith ior‘grinding there
by, including .a slide,-a ñuid cperablepiston car
ried thereby for clamping work> thereinfalsub-r. 20
4adapted to be closed by the'movement of said , -support’for'the‘ slide includingv a fluid operable
slide to a grinding position.
ì
5. In a grindingV machine, the combination of ~a
A»piston‘for causing positioning of the ñrst slide. in
~a grinding plane'with respect to the grinding
wheel, »and aA single control valve- for controlling
>actuation of» each` of said pistons.
lOwA 'grinding machine having a ,grinding
r'grinding wheel, of means for operatively-.associ
ating a work piece therewith for grinding thereby,
includingza ñrst slide having Í-a power operable
clamp mounted thereon, a removable »work holder wheel, a Work support, power operable means for
-adapted to be inserted> in` said clamp, and there -eiîecting multiple reciprocations Aof >the work
:by secured to the slide, .a supporting slide for the support're‘lative to the 'grinding wheel, -airotat
first slide, a sub-support for moving all of said Vable mechanism coupled for actuation-:bysaidh 30
parts- into a` grinding position with respect to the power operable means at aslow rate as‘respects
-'grinding wheel, and iiuid operable means for the period of reciprocations of the worksupport,
actuating said clamping means and said sub-sup
means coupling said mechanism for feeding" the
port.
'
`slide toward’the grinding wheel, and. means re
sponsive to one revolution of said mechanism ,. 35
35 l6,'In -argrinding machine,>the combination` of
va `grinding wheel, a slide reciprocable `relative to for stopping said power operable means.
the-grinding wheel and having a clamping jaw,
llpIn a -grinding machine for Y‘grooving V`a
a Vremovable work holder adapted to be inserted Ylaminated bodyor the like, the combination-"with
in said jaw, fluid operable means for holding‘the a grinding wheel support, of amechanisrn op
work carrier in'said jaw, a sub-support for said posing the wheel for determining presentation :of y, 40
slide, fluid operable'means for'moving the sub
work in- operative relation thereto, includingia
support and thereby the slide into grinding po support for introduction of .a work piece., a'lwork
Sition with respect> to the grinding wheel and re
carrying slide adjacent the support Aand recipro
tracting the same, a common control valve for
cable in a direction tangentially ofthe grinding
each of said fluid operable means and movable
to a- position to eiîect simultaneously unclamping
of said jaws and retraction of the sub-support,
and means to delay operation of said unclamping
means until the sub-support has been retracted.
7. In a grinding machine, the combination
50 with a grinding wheel, of a slide movable toward
‘ and from the grindingwheel, a-work table and a
vprime mover carried by the slide, means Opera
55
, 6.0
tively connecting the work table to the prime
»mover for reciprocation therebyand for infeed
ing the same relative to the slide, an electrical
control circuit including a power operable switch
for the prime mover, a pilot control circuit for
said switch including a ñrst pair of pilot switches
operable by the slide for closing said power op
erable switch, and a second pair of pilot switches
successively operable by the prime mover for
opening said power operable switch.
wheel face, a ñrst power operable means for rais 45
ing the work from the support and securing same "
on the reciprocable slide, additional power means
for effecting multiple reciprocationsl of the slide
and attached work tangentiallyras respects the
grinding wheel‘face, means operable in timed're
lation with the reciprocationsV of the slide for~`
eiîecting a gradual movement of the slide and
work in a radial direction as respects the opera
tive facecof'the grinding wheel, and’means for
Adiscontinuing both the feeding and reciprocatingî; 55
movements.
12. A machine as specified in claim 11 in.which
. the discontinuing means comprises a single revo
lution control device operable by >and Yin’ti-med
relation with the power driven feed mechanism. 80
EDGAR D. VANCIL.
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